A103



The Doepfer A-103 is a voltage controlled low pass filter with 18dB/octave slope. The circuit is based on a modified transistor ladder (moog ladder) and is a reproduction of the legendary tb303 filter.

As for the rest the a-103 is identical to the a-120 moog low pass filter (same controls, inputs/outputs) only the filter sound is different.

This module has a maximum current draw of 30ma. it requires 8 te/hp worth of space to fit in a Euro rack frame.

Photo and text courtesy of Shaun Cleary at Analogue Haven